DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
ShareAccount - Share your account without giving out your password
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Notopass - Share your accounts without giving username/password
Confluence - Confluence is content collaboration software that changes how modern teams work
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.